<template>
  <div id="app">
    <div>
      <span>姓名:</span>
      <input type="text" v-model.trim="name"/>
    </div>
    <div>
      <span>年龄:</span>
      <input type="number" v-model.trim="age"/>
    </div>
    <div>
      <span>性别:</span>
      <select v-model.trim="gender">
        <option value="男">男</option>
        <option value="女">女</option>
      </select>
    </div>
    <div>
      <button @click="addFn">添加/修改</button>
    </div>
    <div>
      <table
        border="1"
        cellpadding="10"
        cellspacing="0"
      >
        <tr>
          <th>序号</th>
          <th>姓名</th>
          <th>年龄</th>
          <th>性别</th>
          <th>操作</th>
        </tr>
        <tr v-for="(obj, index) in list" :key="index">
          <td>{{ index += 1 }}</td>
          <td>{{ obj.name }}</td>
          <td>{{ obj.age }}</td>
          <td>{{ obj.gender }}</td>
          <td>
            <button @click="delFn(index)">删除</button>
            <button @click="editFn(index)">编辑</button>
          </td>
        </tr>
      </table>
    </div>
  </div>
</template>
<script>
export default {
  data(){
    return {
      name: '',
      age:'',
      gender: '',
      list: [],
      flag: false,
      id: ''
    }
  },
  methods: {
    addFn(){
      // 非空判断
      if (this.name === '' || this.age === '' || this.gender === '') {
        return alert('输入不能为空')
      }
      // console.log(this.list.some(item => item.name === this.name))
      if (this.flag) {
        this.list.splice(this.id, 1, {
          name: this.name,
          age: this.age, 
          gender: this.gender
        })
        this.flag = false
      } else {
        // 添加信息
        this.list.push({
          name: this.name,
          age: this.age,
          gender: this.gender
        })
      }
      // 清空输入框
      this.name = ''
      this.age = ''
      this.gender = ''
    },
    editFn(index) {
      // 把值赋予输入框
      this.name = this.list[index - 1].name
      this.age = this.list[index - 1].age
      this.gender = this.list[index - 1].gender
      this.id = index - 1
      this.flag = true
    },
    delFn(index) {
      // 删除数据
      this.list.splice(index - 1, 1)
      console.log(this.list)
    }
  }
}
</script>